Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity [Line Items]
State and municipal securities	$ 146	$ 146
State and municipal securities	161	162
State and Municipal [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity [Line Items]
State and municipal securities	146	146
State and municipal securities	15	16
State and municipal securities	$ 161	$ 162